testing

roles/docker/defaults/main.yml

@@ -1,3 +1,4 @@
 docker_root: /var/lib/docker-compose
 docker_compose: /usr/bin/docker-compose
 docker_compose_service: compose
+docker_network: "172.17.0.1/16"

roles/docker/tasks/main.yml

@@ -4,6 +4,18 @@
     state: present
     update_cache: true
 
+- name: Install Docker daemon configuration
+  template:
+    src: daemon.json.j2
+    dest: /etc/docker/daemon.json
+  register: dockerd_config
+
+- name: Restart Docker
+  service:
+    name: docker
+    state: restarted
+  when: dockerd_config.changed
+
 - name: Create docker-compose root
   file:
     path: "{{ docker_root }}"

roles/docker/templates/daemon.json.j2

@@ -0,0 +1,3 @@
+{
+  "bip": "{{ docker_network }}"
+}